40040547649 has 2 divisors, whose sum is σ = 40040547650. Its totient is φ = 40040547648.

The previous prime is 40040547619. The next prime is 40040547691. The reversal of 40040547649 is 94674504004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24479731600 + 15560816049 = 156460^2 + 124743^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040547649 - 2⁹ = 40040547137 is a prime.

It is not a weakly prime, because it can be changed into another prime (40040547619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020273824 + 20020273825.

It is an arithmetic number, because the mean of its divisors is an integer number (20020273825).

Almost surely, 2^40040547649 is an apocalyptic number.

It is an amenable number.

40040547649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040547649 is an equidigital number, since it uses as much as digits as its factorization.

40040547649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 40040547649 in words is "forty billion, forty million, five hundred forty-seven thousand, six hundred forty-nine".